<?php
$collection = array(
0 => array (
0 => '1002', //Push to new array1
1 => '1003' //Push to new array2
),
1 => array(
0 => '7', //Push to new array1
1 => '7' //Push to new array2
),
2 => array(
0 => 'This is my first comment in the box', //Push to new array1
1 => '1This is my first comment in the box' //Push to new array2
),
3 => array(
0 => '2014-01-01 01:16:05', //Push to new array1
1 => '2014-01-01 01:16:05' //Push to new array2
)
);
$collection = array(
array_column($collection, 0),
array_column($collection, 1)
);
var_dump($collection);